کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6634297 461113 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental and kinetic study of catalytic steam gasification of low rank coal with an environmentally friendly, inexpensive composite K2CO3-eggshell derived CaO catalyst
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Experimental and kinetic study of catalytic steam gasification of low rank coal with an environmentally friendly, inexpensive composite K2CO3-eggshell derived CaO catalyst
چکیده انگلیسی
The objective of this research was to study effects of composite catalysts (K2CO3 and eggshell derived CaO) on gasification of Indonesian sub-bituminous KPU coal, which was conducted in a fixed bed reactor at atmospheric pressure. The effects of composite catalysts were evaluated from two sections: syngas compositions and reactivity. At 800 °C, the H2 yield of 1.34 mol/mol-C was obtained and the H2 fraction was 62 vol% when using the composite catalyst (15%K + 5%ES). Compared with only utilization of pure K2CO3 and no catalyst, the composite catalyst (15%K + 5%ES) could increase the yields of H2 by 6% and 123%. In addition, a CO yield of 0.32 mol/mol-C was obtained by utilizing composite catalyst (15%K + 5%ES), and the CO yield increased by 19% compared with utilization of K2CO3 and increased by 100% compared with no catalyst utilization. Through regression, kinetic parameters were determined from the random pore model (RPM), which provided a basis for design and operation of a realistic system. The RPM could adequately describe the conversion rate. Compared with results of non-catalytic steam gasification, the composite catalyst (15%K + 5%ES) was active in increasing the carbon conversion rate constant by more than three times within 700-900 °C due to its ability to reduce the activation energy of gasification by about 38%. It can be concluded that the composite catalyst not only enhances the catalytic effect, but also is environmentally friendly and inexpensive.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 165, 1 February 2016, Pages 397-404
نویسندگان
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